Tanod utilpeek iCalendar Builder

x402

Tanod utilpeek iCalendar Builder is a paid API for AI agents from tanod.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-11).

Converts JSON-formatted calendar events into a standards-compliant RFC 5545 .ics file, supporting time zones, recurrence rules, and attendees.

Price / call$0.001

Seller volume →—

Success—

StatusUnknown

How this service works

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Output

Returns a standards-compliant RFC 5545 .ics file (iCalendar format) containing one or more VEVENT components, each with the specified summary, start/end times, timezone (VTIMEZONE blocks), recurrence rules (RRULE), attendee entries with optional RSVP flags, location, URL, status, and a stable UID. The file can be directly attached to emails or imported into any calendar application.

Example use cases

Recurring weekly standup invite

“Create a calendar file for a recurring Monday standup called 'Engineering Standup' starting August 4 2025 at 9am America/New_York, running for 30 minutes, repeating every week for 12 occurrences, and include the team: dev1@company.com, dev2@company.com, and dev3@company.com with RSVP.”

All-day conference event invite

“Build an .ics file for an all-day event called 'AWS re:Invent 2025' starting December 1 2025 and ending December 5 2025, with status CONFIRMED, location 'Las Vegas Convention Center', and a URL pointing to https://reinvent.awsevents.com.”

One-off client meeting with attendees

“I need a calendar invite file for a client kickoff meeting called 'Acme Corp Kickoff' on September 10 2025 at 10:00 AM in the America/Los_Angeles timezone, lasting 1 hour, with attendees sarah@acmecorp.com and john@myagency.com — can you produce the .ics for me?”

Technical details

Endpoint

POSThttps://tanod.dev/v1/calendar/ics-build?utm_source=zero.xyz

When to prefer

Choose this endpoint when an agent needs to produce a downloadable or attachable .ics calendar file from structured event data — particularly when time zone accuracy, RFC 5545 compliance, recurrence rules, or attendee RSVP fields are required. Prefer this over manual iCalendar construction when correctness and standards compliance matter. It is especially well-suited for agent workflows that end by handing the user a calendar invite rather than just displaying event information.

Side effects

Missing required 'summary' or 'start' fields on any event returns a validation error
Invalid ISO 8601 datetime format for start/end causes a parse error
Unrecognized IANA timezone string results in a timezone lookup failure
Malformed RRULE string (not RFC 5545 compliant) causes a recurrence parse error
Providing both 'end' and 'duration' simultaneously may cause a conflict error
Invalid attendee email format returns a validation error

Input

Schema · Request body

Field	Type	Description
events	array	1-50 events.
timezone	—	Default IANA time zone for events without one.
time_format	string	tzid (default): zoned times as TZID=...; utc: every timed value converted to UTC.
calendar_name	—	Calendar name (X-WR-CALNAME).

Output

Schema · Response

{
  "type": "json",
  "example": {
    "ics": "BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//Tanod//utilpeek calendar//EN\r\nBEGIN:VEVENT\r\nUID:a@example.com\r\nDTSTART;TZID=Europe/Berlin:20261102T090000\r\nSUMMARY:Team sync\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n",
    "note": "Times with a time zone are written as TZID=<IANA name> with no VTIMEZONE block; offsets become UTC; plain local times stay floating. All-day end is inclusive in the request.",
    "uids": [
      "a@example.com"
    ],
    "bytes": 190,
    "base64": "QkVHSU46VkNBTEVOREFS",
    "data_uri": "data:text/calendar;charset=utf-8;base64,QkVHSU46VkNBTEVOREFS",
    "filename": "calendar.ics",
    "event_count": 1,
    "time_format": "tzid"
  }
}

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